Navien NFB-175 Mode D'emploi page 36

With 24VAC connections
Boiler pump
(max. 2.5 A)
Zone pump 1
(max. 2.5 A)
Zone pump 2
(max. 2.5 A)
Zone pump 3
(max. 2.5 A)
36 Installing the System Piping
SUPPLY RETURN OUTDOOR
Pump Ground
NC
NC
COM
NC
LWCO
COM
AC24VL
LWCO
AC24VN
AC24VL
AC24VN
NC
NO
COM
NC
NO
COM
NC
NO
COM
LWCO
AC24VL
AC24VN
C
W
R
C
W
R
C
W
R
C
W
SUPPLY RETURN OUTDOOR DHW TANK R
DHW TANK
C
W
R
C
24 VAC N
W
Thermostat Input
24 VAC L
R
Thermostat 1
C
24 VAC N
W
Thermostat Input
24 VAC L
R
Thermostat 2
C
24 VAC N
W
Thermostat Input
24 VAC L
R
Thermostat 3